Oversize Piston for Cummins B Series Turbo Engines

Description

When your Cummins B series turbo engine starts burning oil or blowing blue smoke, it’s often time for a rebuild. Worn cylinder walls and oversized pistons go hand-in-hand—that’s where this 0.50mm oversize piston comes in. After boring the cylinders, you need pistons that’ll restore proper compression and get your engine running like it should.

What You’re Getting

• Precision-manufactured 0.50mm oversize piston for rebuilt Cummins B series engines
• Turbo-rated design that handles the extra heat and pressure of forced induction
• Proper ring groove spacing and piston crown design for reliable sealing
• Direct replacement sizing for professional engine rebuilds

Built for Real Farm Work

This piston fits the Cummins B series turbocharged engines found in Case IH Maxxum tractors—the 5120, 5140, 5150, 5220, 5240, and 5250 models that handle everything from field work to loader duty. These are the workhorses that power through long days of cultivation, planting, and harvest operations where engine reliability matters most.

Made to Last

Cummins B series engines are known for their durability, and this piston is built to maintain that reputation. It’s designed to handle the thermal cycles and combustion pressures that come with turbo operation, using materials that resist wear and maintain proper clearances over the long haul.

Good to Know

This is a rebuild component that requires machine shop work—you’ll need the cylinders bored to 0.50mm oversize before installation. Make sure to check piston ring availability and have a complete gasket set on hand. A good machine shop will verify deck height and bore straightness as part of the rebuild process.